Metal coated silicon spike cold-electron emitters show improvement of performance with operation

Spanakis, E.; Barberoglou, M.; Zorba, V.; Tzanetakis, P.; Fotakis, C.
January 2010
Applied Physics Letters;1/18/2010, Vol. 96 Issue 3, p033501
Academic Journal
The short lifetime of all field-emission cathodes in harsh vacuum conditions remains a serious hindrance to an attractive display technology. We studied the evolution in operation of cathodes with spikes, produced by femtosecond-laser self-driven structuring of silicon followed by coating with several different metal films. We observe a very promising behavior with gold and chromium only, opposite to that of all other coatings and of bare Si. This is the improvement in operation of the current-voltage characteristics of the cathode. Potential origins of this effect are briefly outlined.


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